Improved doob-gong



PATE NTED DC 31867 fav @citen taten @anni Hirt.

DANIEL LEBRICH, OF PHILADELHIA, PENNSYLVANIA.

Leiters Patent No. 71,627, dated .December 3, 1867.

IMPBOVBD DUUR-HONG,l

To ALL WHoMiT MAY coNoERN:

Be it known that I, DANIEL Lrnnnrcn, of the city and county of Philadelphimand State of Pennsylvania, have invented a new and improved Alarm-Gong; and' I do hereby declare that the following is afull, clear,

l and exact description of the same'yreference being had to the accompanying drawing, 'and to the letters of reference marked thereon. Y o

My invention consists of an alarm-gong, the hammr'of which is on and strikes the bell from the outside. The hammer and the trip-lever are attached to each other, the latter vibrating on `a stud of the former. The loose end of a spiral spring takes against a pin in the upper end of the trip-lever, and causes the hammer, when drawn back and then suddenly released, to spring and strike lthe bell. The hammer has a projection, which takes against the bottom plate of the hammer and springplate, which serves for a spring, whereby it is suddenly withdrawn after striking the bell; and of such other mechanism as is hereinafter shown and described. On rcferenceto the accompanying drawing- Figure 1 is a front view of my new andimproved alarm-gong, and 'Figure 2 is a side view of the same.

Similar letters refer to similar parts in the` two views. A is a bell, suspended from the back plato B of an alarm-gong by the stud a. O 4is an angular plate, fixed to the outer surface of the bell by the stud a, and the nut b. c is a stud, fixed tothe side of the angular plateA C; it extends horizontally across thc bell. D is a curved arm or hammer, on the outer end of the said stud c, reaching to the bottom of the bell. `@Z is a projection or striker on the upper edge, at its lower end, nearlytouching the bell. E is a trip-lever, vibrating on the pin e ofthe extension of the hammer, their surfacesv being l in contact. F is a spiral spring onthe stud c. Ono end of it is looped to take over the pin-fprojecting from the side of the plate C; the other end extends downwardly and takes against the pin gef the trip-lever E.. One ond of lsaid pin bears Vagainst the under side of the lower end of the hammer D, to prevent the 'lever E from rotating on the pin e-,when pressure is applied to its lower end, tending to press it outwardly. h is a projection of the hammer E; it bears against the back ot the angular plate C. H is trigger, which isxed tozthe door over which the gong is placed; its upper end projects a slight distance behind the trip-lever E. The accompanying drawing shows the trigger H in position behind the lever E. On opening the door, it vibrates the 'lever' E in that direction, also the hammer D, they'being connected by the pin e, until the door is opened snieiently to trip the lever E. The spiral spring AF, byits end k bearing against thepin g of the lever E, throws the hammer D and lever suddenly back. The projection c2, striking the bell, causes it to ring. The projection h of the hammer taking against the back of the'angular plate,. which acts by springing the hammer from the bell, thereby preventing it from deadening itssonnd. 4

I When it is desirable to throw the gong out ofuse, lift the end of the spiral spring F into the groove m,

formed in the edge of the trp-lever'E, which throws back the end of the trip-lever, (shown in red lines, fig. 2,) so as not to be acted on by the trigger H when opening thc'door. l

What I claim as my invention, arid desire to secure by Letters Patent, is

1. The angular plate C, hammer D, trip-lever E, spiral spring F, and the stud c, when combined and arranged as shown and described.

2. The hammer D, trip-lever E, and the pin g, as shown and described. t

3. The hammer D, trip-lever E, pin g, and the spiral spring F, asshown and described.

In testimony whereof, I hereunto sign my name to this specification in presence of two subscribing witnesses.

' DANIEL LIEBRICH.

Witnesses:

W. W. Donennn'rr, FnANcrs D. PAsronIUs. 

